Description: The epidermis is the outermost layer of the skin, serving as a protective barrier between the human body and the external environment. Primarily composed of keratinocytes, the epidermis is constantly renewed as dead cells shed and are replaced by new ones. This layer not only provides protection against external factors such as bacteria, viruses, and chemicals but also plays a crucial role in regulating body temperature and hydration. The epidermis is divided into several sublayers, including the basal layer, where new cells are generated, and the stratum corneum, which is made up of dead, keratinized cells. Additionally, the epidermis contains melanocytes, which are responsible for producing melanin, the pigment that gives skin its color and protects against ultraviolet radiation. The health of the epidermis is essential for overall well-being, as any alteration in its structure or function can lead to dermatological issues such as dermatitis, psoriasis, or skin cancer.
